The Psalmist was well aware that there exists a universal law of harmony. He knew that it is a spiritual law, completely separate and apart from matter. He spoke of it as "the law of the Lord," and of its various facets he said, "More to be desired are they than gold, yea, than much fine gold: sweeter also than honey and the honeycomb." Ps. 19:7, 10; He had experienced the harmony that is always the reward of humble obedience to the law of good.
What, then, is God's law of harmony, and the method or rule of its application? Where must we begin in order to understand and demonstrate it? Christian Science teaches that we must first learn something of God Himself in order to obey His mandate intelligently. We must see that He is not a magnified human being with mortal attitudes and motives. The Bible unfolds the nature of God as intelligent good, as Spirit, Mind, Truth, Life, Love, filling all space and including within Himself His perfect universe of spiritual ideas.
Also, Mrs. Eddy uses the word Principle to define Deity. This term gives us a sense of the invariable rightness, the perfect order, the unchanging beneficence of the divine Lawgiver.